206409699352372 has 24 divisors (see below), whose sum is σ = 361413920548296. Its totient is φ = 103148581628928.

The previous prime is 206409699352361. The next prime is 206409699352397. The reversal of 206409699352372 is 273253996904602.

It can be written as a sum of positive squares in 4 ways, for example, as 152651856615696 + 53757842736676 = 12355236^2 + 7331974^2 .

It is a super-3 number, since 3×206409699352372³ (a number of 44 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 206409699352298 and 206409699352307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369595698 + ... + 370153750.

It is an arithmetic number, because the mean of its divisors is an integer number (15058913356179).

Almost surely, 2^{206409699352372} is an apocalyptic number.

It is an amenable number.

206409699352372 is a deficient number, since it is larger than the sum of its proper divisors (155004221195924).

206409699352372 is a wasteful number, since it uses less digits than its factorization.

206409699352372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608307 (or 608305 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 67.

The spelling of 206409699352372 in words is "two hundred six trillion, four hundred nine billion, six hundred ninety-nine million, three hundred fifty-two thousand, three hundred seventy-two".